/**
 *    Copyright 2009-2015 the original author or authors.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package org.apache.ibatis.annotations;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

import org.apache.ibatis.type.JdbcType;
import org.apache.ibatis.type.TypeHandler;
import org.apache.ibatis.type.UnknownTypeHandler;

/**
 * 一组实例值被用来决定结果映射的表现
 * @author Clinton Begin
 */
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface TypeDiscriminator {
  /**
   * 列名
   * @return
   */
	String column();
	  /**
	   * java类型 
	   * @return
	   */
  Class<?> javaType() default void.class;
  /**
   * jdbc类型
   * @return
   */
  JdbcType jdbcType() default JdbcType.UNDEFINED;
  /**
   * 类型处理器
   * @return
   */
  Class<? extends TypeHandler<?>> typeHandler() default UnknownTypeHandler.class;
  /**
   * case
   * @return
   */
  Case[] cases();
}
